Hey Zack,
Thanks for reaching out.
I’m sorry to bear the bad news, but yes, unfortunately at this time the only course of action for this selection is to choose the listed city closest to the event venue (or any whose timezone matches the timezone of the venue location).
I cannot deny this is frustrating, but want to highlight that this is mostly due to a limitation imposed by the programming language itself.
WordPress is written in PHP—by extension, our plugins are too. PHP does not currently offer a full list of the American time zones “EST”, “EDT”, “CDT”, and so on.
As noted in this comment on the official list of American time zones, though, workarounds are sometimes possible → http://php.net/manual/en/timezones.america.php#114694
☝️ So a workaround like this may be something we can roll into the plugins eventually. I will make a feature ticket for our developers so that we can look into this.
To be frank, if this even is possible within our plugins, it would not arrive in a published release for several weeks at least, and likely longer. I’m sorry if that’s a bummer, but just wanted to be frank so that you can best set your expectations.
I hope this information is helpful, in some sense—please let me know if so, and if there’s anything else I can try to help with in the meantime.
Sincerely,
George